WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
SEC filings, insider trading & institutional ownership from EDGAR.
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Latest filings
10-K, 10-Q, 8-K, Form 4 & 13D/G. Sourced directly from SEC EDGAR
No filings are available yet.
Top holders
13F & 13D/G • latest quarter
| Holder | Filed | Value |
|---|---|---|
| Dimensional Fund Advisors LP | Nov 4, 2026 | $322.24M |
| Neuberger Berman Group LLC | Oct 27, 2026 | $247.03M |
| BlackRock, Inc. | Aug 7, 2026 | $244.39M |
| Vanguard Portfolio Management | Aug 13, 2026 | $232.16M |
| Vanguard Capital Management | Aug 13, 2026 | $222.85M |
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Data as of Nov 9, 2026Source: SEC EDGAR.